A structure for shielding a rail includes a rail configured to be mounted on a vehicle body, a drive unit movably connected to the rail, a swing arm rotatably connected to the drive unit and a sliding door, a shade bar configured to be in contact with the swing arm and connected to the drive unit so as to be movable in a first direction in which the shade bar moves close to the rail or a second direction in which the shade bar moves away from the rail, and a cover having a first end connected to the shade bar, the cover configured to open or close a space in which the rail is positioned in accordance with a movement of the drive unit.

A roller carriage arrangement for a door or a window of a building, wherein the window or the door has a fixed frame and a leaf which can be released from the fixed frame and which can be displaced relative to the fixed frame together with the roller carriage arrangement.

A vehicle door opening and closing apparatus includes a rail configured to be mounted on a vehicle body, a roller unit configured to be mounted on a vehicle door, move along the rail, and allow the vehicle door to open and close in a sliding mode and a swing mode, a center rail configured to extend from a rear edge of a door aperture of the vehicle body, a center roller unit configured to be guided along the center rail, and a flap mechanism configured to prevent the center roller unit from being separated from the center rail in the sliding mode, and to allow the center roller unit to be released from the center rail in the swing mode.

A structure for preventing opposite sliding doors from swaying is provided. The structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower rail roller unit rollably connected to the lower rail, a lower rail swing arm rotatably connected to the lower rail roller unit and a door, a guide roller unit fixedly connected to the lower rail, the guide roller unit including a guide roller rotatably connected to the lower rail, and a guide stopper fixedly connected to the door. The guide stopper includes a guide route formed inside the guide stopper and configured to serve as a rolling movement route for the guide roller, an exit/entrance portion formed at a first end of the guide route, and a stop portion formed at a second end of the guide route.

A dual lower rail structure for opposite sliding doors is provided. The dual lower rail structure includes a first lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a second lower rail mounted in a longitudinal direction on a vehicle body at one side of the first lower rail, a first lower rail roller unit rollably connected to the first lower rail, a second lower rail roller unit having one end rollably connected to the second lower rail, and the other end connected to a sliding door, and a lower rail swing arm rotatably connected to the first lower rail roller unit and the sliding door.

A hold-open lock apparatus of a sliding door configured to limit or release rotation of a swing arm without interference with a rail is provided. The hold-open lock apparatus includes a catch unit including a catch pin that serves as a center of rotation of the swing arm, a catch fitted over the catch pin, and a pawl release lever rotatably fitted over the catch pin. The hold-open lock apparatus further includes a pawl unit including a pawl pin located on a side of the swing arm, and a pawl rotatably fitted over the pawl pin and configured to be locked to or unlocked from the catch. The hold-open lock apparatus also includes a cable unit connected to the pawl release lever and configured to rotate the pawl release lever. The pawl release lever is configured to rotate in one direction to rotate the pawl.

A locking structure can be used for a rectilinear center rail for opposite sliding doors. A rectilinear center rail mounted in a longitudinal direction on a sliding door, a center roller unit rollably connected to the center rail, and a swing bracket rotatably connected to the center roller unit and a vehicle body. The center roller unit includes a first rotating member and a second rotating member, a first catcher formed on the center rail to hinder a movement of the center roller unit, a second catcher formed on the swing bracket to assist a movement of the center roller unit, and a first lever configured to be locked by or unlocked from the first catcher and a second lever configured to be locked by or unlocked from the second catcher are connected to the second rotating member.

A structure can help to prevent deviation of a sliding door. The structure includes a lower rail mounted in a longitudinal direction of a vehicle body, a slider inserted into and rollably coupled to the lower rail, a swing arm rotatably coupled to the slider and a door of a vehicle, and a lifter having a first end rotatably coupled to the swing arm and a second end rotatably coupled to the door. The lifter is configured to move along with a rectilinear motion or a rotational motion of the swing arm. One end of the swing arm coupled to the door and the other end of the lifter coupled to the door are spaced apart from each other at a predetermined distance and support the door.

The present invention is directed to a stepless sliding doors system, comprising: two sliding doors (10), at least one of them comprising: two vertical poles (30); means (50) for rotating each of the vertical poles (30); to each side of the vertical poles (30) is firmly connected a hand-connector (36); each of the hand-connectors (36) is pivotally connected to a rail-cart (18) having two rollers (42); each of the rail-carts (18) comprises a horizontal hinge (58) disposed between the rollers (42), and a vertical springy hinge (70), for applying pulling or pushing force of the rollers on a rail thereof, thereby allowing placing the sliding doors of the system in the same plane when in the closed state of the doors, and shifting the doors one along the other in the open state thereof, and additionally preventing the wheels to deviate from a rail in the case of slight deformations.

A structure of a sliding trim cover is for opposite sliding doors and includes: a center rail mounted at a center inside the opposite sliding doors in a longitudinal direction of a vehicle body; a trim unit including an upper trim and a lower trim to surround the center rail to prevent the center rail from being exposed to the outside; an opening between the upper trim and the lower trim; a center roller, which includes a fixing unit and a rolling unit, the center roller being coupled to the center rail through the opening; and a sliding trim cover with one end connected to the rolling unit. The sliding trim cover slides in parallel with the center rail to open or close the opening when the door is opened or closed. The sliding trim cover opens the opening when the door is opened and completely closes the opening when the door is closed.